iRobot, makers of those cute vacuums, also produces badass, Rambo-esque killing machines. Their newest creation, the iRobot Warrior, is a 250lb beast that can move 12mph over varied terrain, including stairs, while carrying up to 100lbs on its back. Admittedly the device is not planned for killing (yet), but will instead be used for explosive disposal, casualty extraction and firefighting.